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T. E. Haynes Hot Air Engine.

Running it on gas?

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Bo'sun	21/06/2023 10:43:18
754 forum posts 2 photos	Good morning All, A couple of years ago, I built the T. E. Haynes Hot Air Engine, and it ran extremely well using a Trangia meths burner from a camping stove. Admittedly, with the addition of a cooling jacket on the "cold" end of the transfer cylinder. Recently, I decided to run it using the attached gas burner. I used a disposable propane/butane cartridge and regulating valve. The result was a very sooty flame, completely blackening the transfer cylinder. Would it help if I modified the burner like a Bunsen Burner to entrain and regulate the air/gas mixture? I did wonder if the burner jet was a bit on the large side at 1/16" dia? Thoughts and comments appreciated. I know it's only a basic model, but it has nostalgic memories from making the first one at school 50 years ago.
JasonB	21/06/2023 10:55:21
25215 forum posts 3105 photos 1 articles	More air will give a bluer less sooty flame and 1/16" is massive
Bo'sun	21/06/2023 11:05:15
754 forum posts 2 photos	Thanks Jason, Any suggestions as to burner orifice size anyone?
JasonB	21/06/2023 11:24:51
25215 forum posts 3105 photos 1 articles	small as you can get, something like a No5 which is 0.2mm This uses a 0.07mm jet from the smallest Sievert nozzle Edited By JasonB on 21/06/2023 11:33:29

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